| KE De-qing,PAN Ying-jun.Study on Oxidation Resistance of ZrO2-Y2O3and A12O3-TiO2Coatings by Plasma Spraying on Copper Alloy[J],43(3):64-67,73 |
| Study on Oxidation Resistance of ZrO2-Y2O3and A12O3-TiO2Coatings by Plasma Spraying on Copper Alloy |
| Received:December 26, 2013 Revised:January 18, 2014 |
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| KeyWord:plasma spraying copper alloy zirconia ceramics alumina ceramics oxidation resistance at high temperature |
| Author | Institution |
| KE De-qing |
Materials and Metallurgy College, Wuhan University of Science and Technology, Wuhan , China |
| PAN Ying-jun |
Materials and Metallurgy College, Wuhan University of Science and Technology, Wuhan , China |
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| Abstract: |
| Objective In order to study the oxidation resistance of ZrO2-Y2O3and A12O3-TiO2coatings, ZrO2-Y2O3and A12O3-TiO2coatings with NiCrAl bonding layer were successfully prepared by plasma spraying process. Methods The microstructures, element types and levels and micro-hardness of the different coatings were studied by metallurgical microscopy, scanning electron microscopy ( SEM) , energy dispersive spectrometer ( EDS) and micro-hardness measurement. Oxidation resistance of all the specimens were tested under the same conditions. Results Both ZrO2-Y2O3and A12O3-TiO2coatings had a significant layer structure, good adhesion and low porosity. The micro-hardness of ZrO2-Y2O3and A12O3-TiO2coatings was 423HV and 628HV, respectively. Both ZrO2-Y2O3and A12O3-TiO2coatings had certain oxidation resistance. NiCrAl bonding layer was the weakest part of the whole coatings. Conclusion ZrO2-Y2O3coatings had better oxidation resistance than A12O3-TiO2coatings. |
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